Hoist controller



Nov. 12, 1963 A. R. LILLY HoIsT CONTROLLER 5 Sheets-Sheet 1 Filed Aug.50. 1960 A. R. LILLY HOIST CONTROLLER 5 Sheets-Sheet 2 Nov. 12, 1963Filed Aug. 30, 1960 Nov. 12, 1963 A. R. LILLY 3,110,199

HoIsT coN'rRoLLER Filed Aug. 30. 1960 5 Sheets-Sheet 3 Nov. 12,1963 A,R, LILLY 3,110,199

HOIST CONTROLLER Filed Aug. 30, 1960 5 Sheets-Sheet 4 nd (dw/0546 Nov.12, 1963 A.R.L1LLY HorsT CONTROLLER 5 Sheets-Sheet -5 Filed Aug. 30.1960 United States Patent O 3,110,199 HOIST CONTROLLER Arthur RichardLilly, 167 Rudd Road, Illova, Johannesburg, Transvaal, Republic of SouthAfrica Filed Aug. 30, 1960, Ser. No. 52,87 (i` 3 Claims. (Cl. 74-785)This invention relates to a mechanism for shadowing the control of amine hoist and is generally known as a controller and is so referred toherein. v

Controllers are in use which incorporate gears and other mechanism whichmust be speciiically selected and built into the apparatus to suit thespecific program of hoisting required. Whenever changes must be made insuch program, serious alterations must be made in the internal gearing,the dial cams, and the drive to any governor, to make them suitable forthe new conditions.

It is the object of this invention to modify controllers to make themmore suitable in their application to mining hoists generally and moreeasily adjustable to the required operations of the particular hoist towhich they are attached.

In accordance with this invention a controller for a winding hoistdriven by a shaft connected to the hoist drum and having a cam dial forregulating the winding trips is provided with an epicyclic gear traindriven by the hoist drum driving shaft and having the cam dial driven bythe epicyclic gear.

The invention provides also for the controller to have a single cam dialfor regulating -both the up and down trips with mechanical links betweenthe epicyclic gear operating to rotate the dial through less than v180"in one direction for one trip and less than 180 in the oppositedirection for the return trip.

The invention further provides adjustable lugs on the epicyclic gear forregulating the length of the trips before the controller is brought intooperation, and a mechanical linkage from the hoist drivers controls forthe adjustment of stops cooperating with said lugs for adjustment of thecontroller when rock or men are hauled.

The invention is illustrated schematically in the accompanying drawings,in which:

FIG. l is a side elevation of the controller showing the cam dial,

FIG. 2 is a section on the line 2 2, FIG. 1,

FIG. 3 is an exploded View of the train of gears driving the cam dial,

FIG. 4 is a view showing the mechanical linkage between the centrifugalgovernor and the safety control switches,

FIG. 5 shows the drive from the hoist to the governor and the cam dial,

FIG. 6 shows the mechanical linkage between the levers manipulated bythe driver of the hoist and the controller for regulating the controlfor hoisting men or rock, and

FIGS. 7, 8 and 9 shows diagrammatically various positions of the camdial.

In the drawings the hoist controller is mounted in and on a closedchamber 11 which is made uid tight so that oil may be made to circulatefor the gearing housed therein.

Into one side of the chamber 11 the drive shaft 12 enters through asuitable bearing and said shaft is driven directly from the hoist drum13 indicated in FIG. 5. From this drive shaft 12 through a worm 14 andworm wheel 1S, the sun Wheel 16 of an epicyclic gear is driven. Saidepicyclic gear comprises an internally toothed ring 17 with one or moreplanetary wheels 18. In the form presently described there are twowheels 1S diametrically opposite one another and carried rotatably on anarm 19 in FIG. 3, so that they mesh both in the sun wheel ice 16 and thetoothed ring 17 in the well known arrangement of an epicyclic geartrain.

As shown in FIG. 3 the arm 19 of the gear train and the cam dial 20carrying the control cams 22 are attached to the same shaft 21.

The dial 20 may be mounted outside of one side of the gear chamber 11.On the opposite side 23 of the chamber 11 is carried a box 24 in whichare assembled the various control switches and switches for lightsindicating the particular condition or functioning of the controller atany speciiic period of the winding trip. Such ancillary electricaldevices are well known and need not be described.

On the top of the chamber 11 is carried a centrifugal governor 25 whichis specially constructed to run at a speed suiliciently high that whenits speed is reduced to the minimum at which it is called upon tofunction it will still have suicient power to control the operations itis necessary for it to perform. In other words a single centrifugalgovernor is sufcient with this controller.

As shown in FIGURE l, the circumference of the dial 26 is considered asdivided into two parts 26, 27 Iand the two cams 22 thereon are shaped tocontrol the speed o-f the hoist at the ends of lowering and raisingtrips respectively. That is one part 26 of the dial circumference withone cam 22 thereon is used to control the up and the other half 27 withits cam 22 .the down trip.

To the shaft 21, is secured the arm 19 (FIGURE 3) of the `epifcyclicgear train and also the carn dial 20. In line with shaft 21 but notkeyed to it is shaft 28 to which is keyed the worm wheel 15 and the sunWheel 16. Shaft 21 and 28 are mounted in line. On shaft 2S theinternally toothed ring 17 runs Vfreely and the discs 29, 30l aremounted to be freely rotatable about the axis of the shaft 21. The discs29, 30 each carry a projecting pin 31 and 32 respectively which are eachyadapted to co-.operate with stops 33, 34 secured in suitable positionson the rim of the internally toothed ring I17. The pins 3-1, 32 and thestops 33-34 co-operate `as hereafter described -to stop when required,the ring 17 from rotating.

The discs 29, 30 are held from rotating and in their required positionby a series of linkages attached to projecting lugs 35 and tying them tothe drivers control lever 36 (FIG. 6). It will 'beunderstood that whenthe internally toothed ring 17 is prevented from rotating by a stop 33or 34 making contact with a pin 31 or 32 the 4arm 19 of the epicyclicgear train willrotate shaft 21and therefore cam disc 2G. Such rotationis required at the termination of a winding trip either down or up ashereafter explained.

'I'he discs 29, 30 are rotated through levers 35 by movement by thedriver of lever 36. Such movement will be necessary to regulate thetravel of the hoist when raising men or hauling rock, as is well known.It will be understood that the rotation of `discs 29, 30 will bring theepicyclic gear into operation to control the speed of the end of thetrip as required.

-Ivt is common practice to provide a cam on the carn dial of acontroller to eliminate the action of the decelera- -tion cam in theinitial acceleration pontion of the trip. In FIG. 4 is shown a cam 37for this purpose. According to Ithis invention and as shown the cams 37are lattached to cams 22 but in a dilferent panallel plane and operate asuitable and well known form of acceleration switch indicated Iat 38.Both cams 22 :are provided with Y the usual cams 39 to operate a limitswitch 40 to come into action in the case of danger of ovenwind.

The centrifugal governor 25 is driven through a bevel gear wheel 41 onthe drive shaft 12. 42 is a bevel pinion on shaft yi3 which also carriesa gear wheel 44 meshing with a smaller gear wheel 45 on the shaft of thegovernor 25 as `shown in FIG. 5.

As shown in FIGURE 4, the vertical plunger 46 of the governor 25connects with the end of a lever 47 which through mechanical linkage 4Sand lever 49 contacts an over speed yand alarm switch 5t). Thismechanical linkage 43 has its action modiied by the lifting of one endof the lever 51 by the operation of the control cam contact lever S2through lever 53'. It is however Well known :to use the lever 52 broughtinto operation (by the cam 22 to modify by the co-operation of thelevers 51 and 47 to regulate the permitted speed of the hoist throughgovernor 25 yand the controller according to this invention has asimilar provision (see FIG. 4) which need not be further described.

In `order to illustrate the working of the controller describedreference is made to the cam dial 26 `diagrammatically illustrated inFIGS. 7, 8 and 9.

In FIG. 7 the control lever 52 is in its neutral position. The ldial 20is stationary and the hoist is being lowered at the speed of the drivemotor. In FIG. 8 the drum of the hoist has notatcd Vso that [the vehicleis approaching the bottom of the shait. The stops have operated -to stopthe rotating wheel 17 of the epicyclic gear and the dial 20 rotates inthe direction of the arrow.

This means that the catrn 37 is immediately brought into contact butcannot operate until the usual direction switch (not shown) has operatedon the start of :the next trip. ln FIGURE 4, the acceleration switchindicated at 38 and operated by cams 37 energises a solenoid 54 whichalters ,the fulcrum point of lever 49 =permitting maximum speed to beattained without operation of over speed switch 50 during theacceleration period.

As shown in FIGURE 9, 22 is raising arm 52 and it can be assumed thatthe driver has control of the operation of the hoist to re-duce thespeed yof the drum i3 and inally stopit. The rotation of the drum i3 isnow reversed and the dial 2i) therefore is rotated in the reversedirection. The weight 55 which is attached by a chain 56 to the bottomtof dial 26 will rettun the `dial from a tilt to bring the cam 22 on theother half of the dial to yits mid-position (FIG. 7) but the control ofthe rate of acceleration will have been removed by the operation of thecam 37 andthe acceleration switch 38.

With the dial stopped in lits neutral position the earn 22 on theopposite or other half of the dial 2? is positioned to come intooperation ito control the end of this next trip .and the program .ofoperations is repeated but in the reverse `direction -as shown in lFIG.9. Y

kTlhis invention provides a controller for a hoist which uses one camdial .for controlling the winding trip in both the up and downdirections. .'Ihis cam dial is driven through an epicyclic'gear rand theprogram of the hoist i trips up or down can readily be arranged by theposi- -tioning of the stops 33 and 34 and this is, in the normal Way,the only `operation required for adjusting the controller for use whenthe trips must be varied in length as for instance on fthe deepening ofthe shaft.

What I claim as new and desire to secure by Letters Paten-t is:

l. A controller for a bidirectional winding hoist and driven thereby,comprising in combination, two shafts in line, coupling means from thehoist to the first shaft, an epicyclic gear train having both a sunWheel and planet Wheels together with a carrier 02E the planet wheelsand an internally toothed ring wheel, means securing theV rst shaft tothe sun wheel of said train, means securing the second shaft to thecarrier of the planet wheels in said train, integral lugs projectingfrom the outer surface of the toothed ring wheel of the train, stopsadapted to en-V gage said lugs to stop rotation of the ring wheel ineither direction of travel and thereby rotate saidcarrier of the planetwheels, `a cam disc attached to said second shaft having a cam locatedfor presentation near the end of the Wind of the hoist in eitherdirection, and a means between said cam disc and the hoist t0 controlthe speed of the hoist at the end of lits wind in either direction whenit encounters the cam.

2. A controller for a bidirectional winding hoist comprising couplingmeans for driving the controller in either of two directions at a speedconsistent with the speed of the hoist, an epicyclic ygear train havingan internal toothed wheel `and a planetary gear, means constantlydriving said train by said coupling means, a normally stationary camdial, lugs positioned on the internal toothed Wheel of the epicyclicgear train, means to engage the lugs to hold the internal toothed Wheelin either direction of rotation, said earn dial coupled to the planetarygear to rotate therewith in a direction corresponding to the directionin which the hoist is being driven when the lugs are engaged, and speedcontrol means operable by said cam dial near the extremities of hoisttravel in either direction.

3. A controller as defined in claim 2, including means for disengagingthe lugs and bringing said cam Vdial to a neutral position between saidextremities.

References Cited in the tile of this patent UNITED STATES PATENTS`2,615,352 Mies etal Oct. 28, 1952 2,778,471 Kuhn Jan. 22, 19572,898,083 Kresl Q 'Aug. 4, 1959 2,912,224 Y Logan Nov. l0, 19593,007,352 Biedess Nov. 7, 196-1

1. A CONTROLLER FOR A BIDIRECTIONAL WINDING HOIST AND DRIVEN THEREBY,COMPRISING IN COMBINATION, TWO SHAFTS IN LINE, COUPLING MEANS FROM THEHOIST TO THE FIRST SHAFT, AN EPICYCLIC GEAR TRAIN HAVING BOTH A SUNWHEEL AND PLANET WHEELS TOGETHER WITH A CARRIER OF THE PLANET WHEELS ANDAN INTERNALLY TOOTHED RING WHEEL, MEANS SECURING THE FIRST SHAFT TO THESUN WHEEL OF SAID TRAIN, MEANS SECURING THE SECOND SHAFT TO THE CARRIEROF THE PLANET WHEELS IN SAID TRAIN, INTEGRAL LUGS PROJECTING FROM THEOUTER SURFACE OF THE TOOTHED RING WHEEL OF THE TRAIN, STOPS ADAPTED TOENGAGE SAID LUGS TO STOP ROTATION OF THE RING WHEEL IN EITHER DIRECTIONOF TRAVEL AND THEREBY ROTATE SAID CARRIER OF THE PLANET WHEELS, A CAMDISC ATTACHED TO SAID SECOND SHAFT HAVING A CAM LOCATED FOR PRESENTATIONNEAR THE END OF THE WIND OF THE HOIST IN EITHER DIRECTION, AND A MEANSBETWEEN SAID CAM DISC AND THE HOIST TO CONTROL THE SPEED OF THE HOIST ATTHE END OF ITS WIND IN EITHER DIRECTION WHEN IT ENCOUNTERS THE CAM.